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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 97 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.76 + 37 =
  2. 2.66 + 77 =
  3. 3.66 + 75 =
  4. 4.42 + 42 =
  5. 5.75 + 25 =
  6. 6.73 + 72 =
  7. 7.78 + 85 =
  8. 8.86 + 43 =
  9. 9.34 + 27 =
  10. 10.58 + 21 =
  11. 11.74 + 18 =
  12. 12.61 + 28 =
  13. 13.71 + 28 =
  14. 14.62 + 71 =
  15. 15.69 + 21 =
  16. 16.24 + 39 =
  17. 17.85 + 45 =
  18. 18.59 + 54 =
  19. 19.36 + 13 =
  20. 20.34 + 18 =
  21. 21.57 + 87 =
  22. 22.62 + 81 =
  23. 23.31 + 21 =
  24. 24.83 + 55 =
  25. 25.65 + 62 =
  26. 26.53 + 26 =
  27. 27.40 + 44 =
  28. 28.52 + 16 =
  29. 29.36 + 37 =
  30. 30.68 + 79 =
  31. 31.81 + 77 =
  32. 32.71 + 54 =
  33. 33.36 + 77 =
  34. 34.75 + 27 =
  35. 35.54 + 83 =
  36. 36.21 + 17 =
  37. 37.27 + 58 =
  38. 38.43 + 52 =
  39. 39.74 + 33 =
  40. 40.49 + 52 =

Answer key

  1. 113
  2. 143
  3. 141
  4. 84
  5. 100
  6. 145
  7. 163
  8. 129
  9. 61
  10. 79
  11. 92
  12. 89
  13. 99
  14. 133
  15. 90
  16. 63
  17. 130
  18. 113
  19. 49
  20. 52
  21. 144
  22. 143
  23. 52
  24. 138
  25. 127
  26. 79
  27. 84
  28. 68
  29. 73
  30. 147
  31. 158
  32. 125
  33. 113
  34. 102
  35. 137
  36. 38
  37. 85
  38. 95
  39. 107
  40. 101

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